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Finding the Fourth Proportional to 323,715.80, 485,688.90 and 312,195.80

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Solution

The fourth proportional to 323,715.80, 485,688.90 and 312,195.80 is: 468,404.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,715.80 : 485,688.90 = 312,195.80 : x
  2. Step 2: Convert to fraction form
    323,715.80/485,688.90 = 312,195.80/x
  3. Step 3: Cross multiply
    323,715.80x = 485,688.90 × 312,195.80
  4. Step 4: Simplify right side
    323,715.80x = 151,630,034,686.62
  5. Step 5: Solve for x
    x = 151,630,034,686.62/323,715.80
  6. Step 6: Final answer
    x = 468,404.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.